Fix XMPP not working with non-TLS servers (home-assistant#150957)

Author: Human

homeassistant/components/xmpp/notify.py

@@ -146,6 +146,8 @@ def __init__(self):
 
             self.enable_starttls = use_tls
             self.enable_direct_tls = use_tls
+            self.enable_plaintext = not use_tls
+            self["feature_mechanisms"].unencrypted_scram = not use_tls
             self.use_ipv6 = False
             self.add_event_handler("failed_all_auth", self.disconnect_on_login_fail)
             self.add_event_handler("session_start", self.start)